iCal could not log into the caldav server

Hi,

I have a OS X Lion server that i am trying to set up for home. I have made an account for myself and have got mail running for it but when I go to turn on Calendars and Reminders, i get the error message iCal could not log into the caldav server "me.com". One I am not sure how this has anything to do with me but anyway, the mail compnent works. Also when i go to the folder webdav via browser servername/webdav/ i get permission denied. I also get and Unathorized message when I try to specifically access the calendar via adress https://servername:8443/calendars/users/username/ I mention the permission denied stuff because i am assuming they are all connected to the Calendar service (ie it runs on caldav which runs on webdav). can anyone help with this as I would like to get this working.